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QuickTime Video, Sorenson Codec
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Format Description Properties
• ID: fdd000088
• Short name: QTV_Sorenson
• Content categories: moving image
• Format category: file format, bitstream encoding
• Last significant update: 2007-08-07
• Draft status: Full
Identification and description ![Explanation of format description terms](info.gif)
Full name | QuickTime Video, Sorenson Codec |
Description | File format that wraps a Sorenson video bitstream with other data chunks, e.g., audio. |
Production phase | Used as a final-state format for enduser delivery; may also be used as a middle-state format, e.g., as the video source when producing lower-resolution streaming versions. |
Relationship to other formats | |
Subtype of | QuickTime |
Contains | Sorenson_3 video codec |
May contain | Audio streams not documented at this time |
Local use ![Explanation of format description terms](info.gif)
Sustainability factors ![Explanation of format description terms](info.gif)
Quality and functionality factors (video) ![Explanation of format description terms](info.gif)
Normal rendering | Good support. |
Clarity (support for high image resolution) | Moderate, given that this is a format typically used for compression and does not support interlaced video. Outcome will depend on the type and extent of compression, and the encoder used. Several commentators state that the quality of QTV_Sorenson surpasses that of QTV_AppleVideo and QTV_Cinepak, at the same bitrate. At higher bitrates, QTV_MJPEG is likely to provide the highest quality of the QuickTime codecs described at this web site. |
Fidelity (support for high audio resolution) | See QuickTime |
Support for multiple sound channels | See QuickTime |
Functionality beyond normal video rendering | See QuickTime |
File type signifiers ![Explanation of format description terms](info.gif)
Tag type | Value | Note |
Filename Extension | mov | |
Internet Media Type | See QuickTime | |
Magic numbers | See QuickTime | |
Video type tag (QuickTime) | svqi | Four-character code identifying the Sorenson video codec, from QuickTime File Format, p. 92 or p.96.1 |
Notes ![Explanation of format description terms](info.gif)
Format specifications ![Explanation of format description terms](info.gif)
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Useful references
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See QuickTime
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Last updated: Tuesday, 21-Aug-2007 14:18:27 EDT